America's Littlewood crisis: the sentimental threat to animal research.
D000818:Animals; D000830:Animals, Laboratory; D002309:Cardiology; D049671:History, 18th Century; D049672:History, 19th Century; D007883:Legislation, Medical; D012106:Research; D006113:United Kingdom; D014481:United States; D014824:Vivisection